Tying machine



Oct. 12, 1948. B. H. BUNN 2,451,197

TYING MACHINE Original Filed Feb. 10, 1942 6 Sheets-Sheet l r4 fieg'amff mm Oct. 12, 1948. B. H. BUNN 2,451,197

'I'YING MACHINE Original Filed Feb. 10, 1942 e Sheets-Sheet 2 Oct. 12, 1948. B. H. BUNN 6 Sheets-Sheet 3 -9.= 0 7a 7 Q 103 g 6 //6 5 96 I 1 66 Q5 a5 4 97 1 i B. H. BUNN TYING MACHINE Oct. 12, 1948.

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Original Filed Feb. 10, 1942 Oct. 12, 1948. B. H. BUNN 2,451,197

TYING MACHINE Original Filed Feb. 10, 1942 6 Sheets-Sheet 6 he; 65 .geyk gm Patented Oct. 12, 1948 TYING MACHINE Benjamin H. Bunn, Chicago, Ill., assignor to B. H. Bunn Company, Chicago, 111., a corporation of Illinois Original application Feb ruary 10, 1942, Serial No.

430,253. Divided and this application February "I, 1945, Serial No. 576,653

18 Claims.

My present invention relates to tying machines which automatically wrap twine about a package and secure the twine ends together as by knotting them.

The present application is a division of my prior application, Serial No. 430,253, filed February 10, 1942, which issued as Patent No. 2,371,024, dated March 6, 1945 for tying machines, and is directed specifically to an improved brake mechanism.

Package tying machines of the general type set forth in my Patent No. 1,606,290, dated November 9, 1926, are in widespread use in many industries. In this type of machine a rotating crank-like twine arm is used to carry one or more wraps of twine about a package supported on the machine, the wrapping operations being followed, in direct and automatic sequence, by the knotting together of the ends of the twine warps, and the severing of the twine.

Machines of the rotating twine arm type in the past have been limited, from a practical standpoint, in the size of package which they were adapted to handle conveniently. Theoretically at least a machine could be built capable of wrapping almost any size package desired. Actually, however, the need for standardization of parts throughout an entire line of machines, together with the necessity for increasing the sizes of the various parts of a machine, in proportion to its increase in capacity, has prohibited the building of machines for wrapping extremely large packages. The net result has been that standard sizes of machines have been adopted, and such machines have been used by their purchasers to wrap the bundles within the limited size range for which they were adapted, and the larger packages were continued to be wrapped by hand.

One object of my invention is to increase the package size capacity of a more or less standard package wrapping machine without enlarging the machine or increasing the radius of the twine arm, and without revising or re-locating the more complicated working parts. This I may accomplish by a simple tilting of the frame of the package tying machine so that the twine arm has a longer sweep from front to back around an island table, pivotally mounted within the sweep of the twine arm.

The various gears, shafts and levers, as well as the twine arm, all have an inertia imparted to them by their movement in a wrapping operation, so that there is a tendency for these parts to overrun at the completion of a wrapping operation.

A further object of my invention is a more positively operated arresting of the movement of the operating parts of a package tying machine upon the completion of each cycle of operation, in such a manner as to leave the parts free for movement at the initiation of each succeeding wrapping operation.

My prior Patent No. 1,606,290 shows the use of an island table, pivotally mounted with respect to the twine arm of a wrapping mechanism, the mechanism being arranged to carry a reach of twine completely around a package lying partially on the island table, and partially on a fixed table supported on the frame laterally adjacent the island table. In the past I have employed various devices such as a stop bracket (Patent No. 1,606,290) and a twine trap (Patent No. 2,358,685, dated September 19, 1944) to support an island table against pivotal movement about its axis during a twine wrapping operation. These devices are suitable for their purpose, but where a broad island table is employed, and where a heavy package is apt to be placed on the table at one side or the other of its pivotal axis, the torque produced thereby on the pivotal mounting of the island table is apt to cause interference with the free passage of a reach of twine as it is carried around a package, or to bind the side faces of a twine trap member with the possibility of in terfering with the proper operation of the machine. A further object of my invention, therefore, is to eliminate any stop, trap, or like impedance in the path of the twine by anchoring the island table of the package tying machine against pivotal movement by means remote from the path of the twine.

These and other objects and advantages of my invention will be set forth in the following description of a specific embodiment thereof, and illustrated in the accompanying drawings.

In the drawings, of which there are six sheets:

Fig. 1 is a view in side elevation of a tying machine embodying the present invention;

Fig. 2 is a view in front elevation of the machine of Fig. 1, a portion of a front plate being broken away to show the twine arm;

Fig. 3 is an enlarged fragmentary section taken on the plane of the line 3-3 of Fig. 1;

Fig. 4 is an enlarged fragmentary section taken on the offset planes of the broken line 4-4 of Fig.

Fig. 5 is an enlarged fragmentary section taken on the offset planes of the broken line 5--5 of Fig. 2;

Fig. 6 is a reduced plan view of the complete machine; and

Fig. 7 is an enlarged sectional detail View through the axis of the twine arm hub member.

Knotting or twine securing mechanism capable of being employed in connection with my present invention, as well as other parts of the present illustrative machine, may be similar to those of the tying machine disclosed in my Patent No. 1,608,290. In order, therefore, to simplify the present specification, the reader is referred to that patent for an understanding of the general structure and operation of the machine, and the present specification will be directed more particularly to the novel features of my present invention.

Referring to the drawings in detail, a framell comprises cast metal end members l2and l3 provided with rearward extensions [4 for increasing the stability of the machine, the'lower ends of these end frames being provided with pivoted casters l5. It will be noted in Fig. 1 that the entire end frame members, with the exceptionof their extreme lowermost portions, are tilted rearwardly. Thus, it is possible, by a slight modification of the lower portions of the end frames, to construct end frames adapted to the present invention from the same general type of patterns as those used for the straight vertical frames of my prior machines.

A fixed table top it of sheet metal is secured to the upper end of the frame H as by means of brackets H, to position this fixed table in a substantially horizontal plane in, spite of' the rearward tilt of the frame achieved by the lower end support arrangement. The fixed table top i5 is relatively large and extends rearwardly well beyond the rear of the frame H. wardly extending portion of the table is supported by an auxiliary leg I8 which may be of band steel. The fixed table also extends outwardly to the left well beyond the frame, as illustrated in Fig. 6, and this laterally extending portion is supported by a bracket IS; the lower end of which is bolted to the end frame. The front portion of the fixed table is offset upwardly as at 2! on a line approximately above the knotter beak 28 (Fig. 6) to assistin positioning properly a package mounted on the table for Wrapping.

An electric drive motor 23 is mounted on. a support plate 24 secured to a transverse lower frame portion 25, and is connected by meansof a V-pulley 26 and V-drive belts 2'! to a V-pulley 28.

which normally is adapted to rotate freely on a clutch shaft 29, the pulley 28 being adaptedto be connected by means of a clutch 30'to the clutch shaft 29 upon operation of the clutch.

This rear- A clutch control pedal 33 is pivotedon a bracket 4 34 which is secured to the transverse frame member 25, the clutch pedal having a clutch operating rod 35 connected thereto, andnormally held in up-raised inoperative position by a coil compression spring 36 which isheld in compression between a collar 3] onthe clutch-operating.

rod 35' and a bracket 38 supported. on the end.

frame member.

A pinion 39 is keyed to the clutch shaft and is. in constant. meshed engagement with one side of a mutilated gear 46. The mutilated gear is, in general, similar to that of the machine described in my Patent No. 1,606,290, the lefit hand portion of the mutilated gear being fully toothed throughout its entrieperiphery, whilethe righthand portion thereof has the teeth cutawayfor a portion of its circumference. Throughout a portionof each rotation of the mutilated ge'ar 48, the teeth on the right hand side thereof will be in driving engagement with the teeth of a twine arm drive gear 43 which is journaled on the frame ll. During a further portion of such rotation, the twine arm drive gear 43 will be over the untoothed portion of the mutilated gear 48 and therefore will not be driven thereby during such latter portion.

The mutilated gear is provided with a laterally extending flange 44 along the untoothed or mutilated portion thereof, which flange is adapted to support a shoe 45 secured to the side of the twine arm drive gear to hold the twine arm drive gear against rotation during the time the shoe is riding on the flange, and the twine arm drive gear is in registry with the untoothed portion of the mutilated gear.

A chain drive sprocket 46 is secured to the twine arm drive gear to rotate therewith, and is in driving engagement with a chain ll which also runs over a driven sprocket. 4B: which. ism'ounted on,- andis keyed to a twine arm nubile;

A tightenin arrangement. for the drive chain.

41 (best illustrated in Figs. 3, 4 and 5) comprises a block 50 pivotally mounted on. a. stub' shaft-.53 mounted in an upwardly. extending portion; of the and frame I3. The pivoted block 50 is mounted laterally adjacent. the chain 41, and-is provided with a roller Ei'whichis mounted ona 'stud' secured to the blocki eccentrically-to. the

shaft 53-to position theroller over, and in rolling contact'with the chain. An adjusting screw 56' is mounted in a'bracket 51', also s'ecuredto the end frame l3, and is adapted toienga'ge the upper surface ofthe blockfili, sothat .by threading. the adjusting screw down to the bracket to increase the pressure on the upper face of'theblock, the.

roller 5k will be: forced: in the direction ofv the chain, and thus may be used'to adjust the chain tension asrequired. The adjusting screw is h'eld in adjusted position. by means of a lock nut 58' which is adapted tobe screwed down into engagement with the upper face-of the bracket 51. The twine arm hub 49, to which the driven 58 at the upper end or the end frame H1. The twine arm hubcomprises a hollow shaft portion 60 extending through the bearing provided witha lateral opening 63' therein as-best.

illustrated in Fig. 3- through which the twine-64 is passed.

Adjacent the opening 63 the hub 49 isprovided with a. socketed extension 65 in which a twinebase portion 14 pivoted tothe twine arm, and having a pair of angularly'extending fingers 15" and" 16 to limit itsrotative movements A metalstrip" is mounted'on' the pivoted base 14, andhas an opening in its outer end adapted tore ceive the twine.- A coil spring 18 is held in tension bet-ween'the-twine arm and a pin 18'; carried-by the: hub 48 which tends tourge. the. slack takeup arm ina clockwise.diiectionfrom. the position illustrated'in Fig. 4' to exert a resil n ten io th tw nean l thereby. takes up any'sl'ackwhichmay occur:

sprocket 48 is keyed, is journaled in a bearing v V 59 and through the driven chain sprocket: 48, and is;

'An island table anchoring gear 80 is journaled for free rotation on the outer end 8i of the twine arm hub 49 (Figs. 2, 3 and 7), this gear being secured between spacer plates 83 and 83a and held in place by a retainingcollar 83b. The plates and the interposed gear are secured together and to a metal strip 84 constituting a portion of the island table support, by screws 85 (Figs. 1 and '7).

In order to anchor the gear 80, and through it the island table, against rotation, the gear Bil is connected through a pair of coaxial gears 86 and 8! to a fixed gear 88 of the same diameter and tooth size as the gear 80, the fixed gear 88 being secured to a bracket 89 which in turn is bolted to the end frame 13. The bracket 89 is provided with an opening 89a (Fig. 7) in its outer or gear supporting end to receive the hub 49 for free rotation therein, as is likewise the fixed gear 88, so that the hub 49 may rotate freely and without interference within the openings in this bracket and the fixed gear 88.

An arm 98 may be cast integrally with the hub 49 to extend radially therefrom, as illustrated in Fig. 3, the arm 98 having a transverse bearing 93 at its outer end in which a shaft 94 (see Fig. 4) is journaled to lie parallel to the axis of the hub 49. The shaft 94 has the pair of co-axial gears 86 and 81 keyed one to each end thereof, these gears being alike, and, respectively, in meshed engagement with the gears Bil and 88. The interconnected pair of co-axial gears are carried bodily around the fixed gear 88 and the island table support gear 80 to produce a relatively reverse drive effect of one to one ratio between the fixed gear and the island table gear, and thereby prevent relative rotation between these gears.

This arrangement permits free rotation of the hub 59 and its supported parts, at the same time preventing any pivotal movement of the island table.

The strip 84 secured to the island table support plate 83 extends vertically downwardly to the desired level of an island table top 9'5 and there it is bent at right angles and extends horizontally substantially the entire width of the.

island table top.

A pair of rectangular metal rods 95 and 8? are secured, one to each side of the outer, or right-hand face of the vertical portion of the strip 84, and extend downwardly well below the right-angle bend in this strip, is illustrated in Fig. 2. These rods are bent angularly upward as at 98 to the level of the underside of the island table top, where they again are bent, as at 99, to extend horizontally under the top of the island table.

A pair of metal reinforcing straps Hill and lfll are secured to the underside of the island table, as best illustrated in Figs. 1 and 2. The central portions of these straps are secured to the under sides of the rectangular rods 85 and 91 which hold the center portions of the straps spaced downwardly from the table top, while the ends of the straps are secured to the underside of the table top. This arrangement forms a truss which adds greatly to the strength and rigidity of the island table.

It will be noted in Fig. 1, that the tilting of the frame, while maintaining the fixed and island tables horizontal, causes the common plane of these tables to subtend a materially larger arc of the cylinder defined by the sweep of the twine arm, indicated by the dash-and-dot circle x, than is the case with a twine arm of the same radius of swing, but mounted on a normal or upright frame, and with the tables horizontal with the upright frame arrangement. Such relative positioning of the tables with respect to an upright frame is indicated by the dash-and-twodot line Y-Y of Fig. 1.

A pair of flanged shields I03 are mounted, one on each side of the island table support plate and rectangular rod assembly, to enclose the sides of the island table anchoring gear 89, as best illustrated in Figs. 1 and 3. A sheet metal safety guard member I04 also is secured by screws H15 to brackets H36 on the end frame l3 to enclose the mechanism on the end frame IS.

A twine supply bucket is mounted at one end of the frame, and a spring controlled twine tensioning device I23 is mounted on the frame to control the tension on the twine 64 as it is led into the hollow hub 49 of the twine arm.

Fig. 1 shows the twine arm 66 in its normal or at-rest position, having just been released from engagement by a brake I01, The brake comprises a flexible friction member 103 which may be a leather strap secured at its ends by rivets N39 to subtend an arcuately bowed metal frame member ill]. The frame member is pivoted as at i 53 to brackets I I4 secured to the frame, and the outer or rear end of the brake member H0 is connected by means of a tension spring H5 to the frame H, normally to urge the brake in a direction of counterclockwise rotation from the position illustrated in Fig. 1.

The forward end of the brake member H0 extends well forwardly from the pivot I I3, as illus trated in Fig. 4, and is provided with a rod H'l secured to extend parallel to the pivotal axis of the brake. This rod carries at its inner end a cam roller H8 which extends into the path of movement of a cam H9 secured to a side of the mutilated gear 40.

The driving arrangement of the illustrated machine is intended to produce three successive rotations of the twine arm during each complete cycle of operation of the machine. The cam H9 is positioned to engage the cam roller H8 and move the brake it? up into operative position as illustrated in Fig. 4 during the third or last rotation of the twine arm in each cycle, and to release the brake from its operative position just prior to the point at which the twine arm drive is released by the arrival of the twine arm drive gear 43 over the untoothed portion of the mutilated gear 4! This action releases the brake and frees the twine arm for unobstructed movement upon the initiation of each succeeding wrapping operation.

While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

I claim:

1. A package tying machine comprising in combination with a frame, a fixed package support mounted on the frame. pivoted island table carried by the frame, a rotatable twine arm pivotally mounted co-axially with the island table, anchor means mounted to anchor the island table against pivotal movement, and cyclical operating means mounted to move the parts through a predetermined cycle on an operation thereof; a brake pivoted on the frame adjacent the path of rotation of the twine arm during a rotation thereof, spring means mounted normally to hold the brake greater 1 jacent the end of its cycle, the .cam means being positioned to release the brake prior to the completion of an operating cycle.

2. A package tying machinecomprising in combination with a frame, a fixed package support mounted on the frame, pivoted island table carried by the frame, a rotatable twine arm pivotally connected co-axially withthe island table, anchor means mounted to anchor the island table against pivotal movement, and cyclical operating means mounted to move the parts through a predetermined cycle on a operation thereof; a bracket mounted on the frame, an arcuate brake support pivoted on the bracket adjacent the path of rotation 7 of the twine arm, a flexible brake band mountedto subtend the arc of the support, spring means connected to the support normally to hold it beyond the path of rotation of the twine arm, and a cam mounted on the cyclical operating means andadapted to engage the support at a predetermined point adjacent the end of each cycle of operation to move the brake support toe ward the twine arm, thereby moving the brake band to lie substantially tangent to the path of rotation of the twine arm near the end of its cycle, the cam being positioned to release the brake support just prior to the completion of an operating cycle.

3. A package tying machine comprising in combination with a frame, a fixed package support mounted on the frame, a pivoted island table carried by the frame, a rotatable twine arm pivoted co axially with the island table, anchor means mounted to anchor theisland table against pivotal movement, and cyclical operating means mounted to move the parts through a predetermined cycle on an operation thereof; a bracket supported on V the frame radially beyond the path of rotation of the twine arm, an arcuate brake support pivoted on the bracket, a flexible brake band mounted to subtend the arc of the support, spring'means connected to the support normally to urge it outwardly away from the twine arm, a roller mounted on the brake support and positioned adjacent the cyclical operating means, and a cam mounted on the cyclical operating means and adapted to engage the roller at a predetermined point near the end of each cycle of operation thereof to move the brake support toward the twine arm, thereby mov ing the brake band to lie substantially tangent to the path of rotation of the twine arm near the end of its cycle, the cam being positioned to release the roller just prior to the completion of an operating cycle. v

4. Ina package tyin machine the combination of'a supporting frame, a pivoted island table carried by said supporting frame and mounted cooperating cycle.

5.. Ina/package tying machine the combination of a supportin frame, a pivoted island-table :cari ried by said supporting frame and mounted 1coaxially with a rotatable twine arm pivotally" leasing the brake prior to the completion of said mountedon said frame, 'means for securing the island Itable against rotative movement, and cyclic operating means carried :by said supporting frame and adapted to move the twine arm through 7 a predetermined cycle at each operation thereof,

a brake movably mounted on the frame and having a shoe adapted to be engaged by said twine arm, said brake being movable into and out of the path of said twine arm, and automaticmeans operatively connected to the cyclic operating means for moving the brake into the path of "the twine arm at a predetermined time adjacent the end of the cycle of operation, said automatic means also releasing the brake prior to the completion of said operating cycle, and spring meanstending to move said brake shoe out 'of the path I of said rotatable twine arm.

6. In a package tying machine the-combination w of a supporting'frame, a pivoted island table carried by said supporting frame and mounted coaxially with a rotatable twine arm pivotally mounted on said frame, means for securing the island table against rotative movement, and cyclic operating means carried by said supporting frame and adapted to move the twine arm through a predetermined cycle at each operation thereof, a

brake movably mounted on the frame and having a shoe adapted to be engaged by said twine arm, said brake being movable into andout of the path of said twine arm, and automatic means operatively connected to the cyclic operating means for moving the brake into the path of the twine arm at a predetermined time adjacent the end ofthe cycle of operation, said automatic means also releasing the brake prior to the completionofsaid operating cycle, said automatic meanscomprising axially with a rotatable twine arm pivotally" mounted on said frame, means for securing the island table against rotative movement, and cyclic.

operating means carried by said supporting frame and adapted to move the twine arm through a predetermined cycle at each operation thereof, a

brake movably mounted on the frame. and having a shoe adapted to be engaged by said twine arm,

said brake being movable intoand out of the path ofsaid twine arm, and automatic means operatively connected to the cyclic operating means for moving the'brake into the path of the twine arm at a predetermined time adl'acent'the end of the cycle of operation, said automatic means also rea cam carried by a part of the cyclic operating means, said cam engaging a part carried by said movable brake means.

7. In a package tyingmachine the-combination V of a supporting frame, a pivoted island table carried by said supporting frame andmounted co-c' axially with a rotatable twine arm 'pivotally mounted on said frame, means for securing the island table against rotat'ive movement, and cyclic operating means carried by said supporting frame and adapted to move the twine arm through a predetermined cycle at each operation thereof, a brake 'movably moun-ted'on the frame and having a shoe adapted to be engaged by said twine arm, said brake being movable into and out of the path of said twine arm, and automatic means operatively connected to the cyclic operating meansfor moving the brake'into the path of the twine arm at a predetermined time adjacent the end of the j cycle of operation, said automatic means also releasing the brake prior to the operating cycle, said brake shoe comprising a :ten-

sioned, nonmetallic, flexible strap located toenw gage a transversely extending portion of the twine 7 arm.

8. In a package tying machine the combination of a supporting frame, a pivoted'island table carried by said supporting frame and mounted co Q 7' l axially with a rotatable. twine larmpivotally mounted on said frame, means for securing the island table'against rotative movementiand cyclic operatingmeans carried by said supporting frame and adapt'cdto move the twine arm through a,

completion of said of said twine arm, and automatic means operatively connected to the cyclic operating means for moving the brake into the path of the twine arm at a predetermined time adjacent the end of the cycle of operation, said automatic means also releasing the brake prior to the completion of said operating cycle, said automatic means comprising a cam carried by one of the parts of said cyclic operating means, said cam increasing in radius and being adapted to move the brake shoe into the braking position.

9. In a package tying machine, the combination of a supporting frame, a hollow shaft rotatably supported by said frame, a rotatable twine arm mounted on said frame and carried by said hollow shaft, said shaft having an axially extending por tion, a bracket supported by said axially extending portion, said bracket having a depending portion, an island table carried by said depending portion, a gear carried by said bracket and a second gear carried by said shaft, said second gear being fixedly .mounted on said frame and said shaft having a radially extending arm provided with a parallel shaft carrying a pair of pinions meshing with said gears whereby the island table may be held in fixed position while the shaft rotates, said twine arm being carried by said shaft and having a radially extending portion of sufiicient length to describe an arc embracing said island table, said twine arm having a substantially axially extending portion with means for carrying the twine at the end of said latter portion, brake means carried by said frame and movably mounted on said frame to be moved into or out of the path of said axially extending portion of the twine arm, and operative connecting mechanism between the twine arm shaft and the brake means whereby the brake is moved into the position to engage the horizontal portion of the twine arm at a predetermined time in the cycle of the rotation of the twine arm.

10. In a package tying machine, the combination of a supporting frame, a hollow shaft rotatably supported by said frame, a rotatable twine arm mounted on said frame and carried by said hollow shaft, said shaft having an axially extending portion, a bracket supported by said axially extending portion, said bracket having a depending portion, an island table carried by said depending portion, a gear carried by said bracket and a second gear carried by said shaft, said second gear being fixedly mounted on said frame and said shaft having a radially extending arm provided with a parallel shaft carrying a pair of pinions meshing with said gears whereby the island table may be held in fixed position while the shaft rotates, said twine arm being carried by said shaft and having a radially extending portion of sufficient length to describe an arc embracing said island table, said twine arm having a substantially axially extending portion with means for carrying the twine at the end of said latter portion, brake means carried by said frame and movably mounted on said frame to be moved into or out of the path of said axially extending portion of the twine arm, and operative connecting mechanism between the twine arm shaft and the brake means whereby the brake is moved into the position to engage the horizontal portion of the twine arm at a predetermined time in the cycle of the rotation of the twine arm, said operative connecting mechanism including gears and a cam carried by one of said gears, said cam engaging said brake means to move it into the braking position.

' 11. In a package tying machine, the combination of a supporting frame, a hollow shaft rotatably supported by said frame, a rotatable twine arm mounted on said frame and carried by said hollow shaft, said shaft having an axially extending portion, a bracket supported by said axially extending portion, said bracket having a depending portion, an island table carried by said depending portion, a gear carried by said bracket and a second gear carried by said shaft, said second gear being fixedly mounted on said frame and said shaft having a radially extending arm provided with a parallel shaft carrying a pair of inions meshing with said gears whereby the island table may be held in fixed position while the shaft rotates, said twine arm being carried by said shaft and having a radially extending portion of sufficient length to describe an arc embracing said island table, said twine arm having'a substantially axially extending portion with means for carrying the twine at the end of said latter portion, brake means carried by said frame and movably mounted on said frame to be moved into or out of the path of said axially extending portion of the twine arm, and operative connecting mechanism between the twine arm shaft and the brake means whereby the brake is moved into the position to engage the horizontal portion of the twine arm at a predetermined time in the cycle of the rotation of the twine arm, said operative connecting mechanism including, gears and a cam carried by one of said gears, said cam engaging said brake means to move it into the braking position, and spring means for moving the brake means out of braking position.

12. In a package tying machine, the combination of a supporting frame, a hollow shaft rotatably supported by said frame, a rotatable twine arm mounted on said frame and carried by said hollow shaft, said shaft having an axially extending portion, a bracket supported by said axially extending portion, said bracket having a depending portion, an island table carried by said depending portion, a gear carried by said bracket and a second gear carried by said shaft, said second gear being fixedly mounted on said fram and said shaft having a radially extending arm provided with a parallel shaft carrying a pair of pinions meshing with said gears whereby the island table may be held in fixed position while the shaft rotates, said twine arm being carried by said shaft and having a radially extending portion of sufficient length to describe an arc embracing said island table, said twine arm having a substantially axially extending portion with means for carrying the twine at the end of said latter portion, brake means carried by said frame and movably mounted on said frame to be moved into or out of the path of said axially extending portion of the twine arm, and operative connecting mechanism between the twine arm shaft and the brake means whereby the brake is moved into the position to engage the horizontal portion of the twine arm at. a predetermined time in the cycle of the rotation of the twine arm, said brake means including a leather strap extending transversely to the length of the horizontal portion of said twine arm and tensioned upon a brake support.

13. In a package tying machine comprising a supporting frame, a twine arm rotatably mounted on said frame having a radially extending portion t1 and an axially extending portion for supporting twine at its end, a brake lever mounted. on said frame said brakelever being bowed, a leather strap. carried by said bowed portion of said brake lever and tensioned thereby, said brake lever and leather strap being mounted to be movable from a position outside the arc of movementjof said axial. portion of. the twine arm. to; a osition ongaging said axial portion, operating. means for said twine arm including a gear, and a cam carried' by said gear and? having a camming' surface ofincreasing radius, said surface engaging a, portion of said brake lever, whereby the brake lever.

is moved into braking position by said cam.

14. In a: packagetying machine comprising a supporting: frame, a twine arm rotatably mounted on said frame having a radially extending portion and an axially extendin portion for; supporting twine at its end, a brake lever mounted on said frame, said brake lever being bowed, a leather strap carried by said: bowed portion of said brake lever and tensioned thereby; said brake leverand leather strap bein mounted to bemovable from a position outside the arc of movement of said axial portion of the twine arm to a position engaging said axial, portion, operating means for said; twine arm including a gear; and 'a cam carried: by said gear and having acamming surface or increasing radius, said surface engaging aportion of said brake lever, whereby the brakelever is moved into. braking position by saidcam, and

spring means carried by said support and attached to; said brake lever and urging said brake lever into a position out of engagement with the twine armi 1'5. In a package tying machine comprising a supporting frame, a twine arm rotatably mounted on said frame havinga radially extendin portionand axially extending" portion for supporting twine at its end, a brake lever mounted on said frame, said brake lever being bowed, a leather element, on. said: operating means whereby the Y "brake: lever is moved into:- braking. position.

strap carried by said: bowed portion of said brake lever and tensioned thereby, said brake lever and leather strap being. mounted to be movable from a position outside the arc. of movement of said axial, portion of the. twine arm to a position engaging: said axial portion, operating means for said twine arm including a. gear; and a cam carried bysaid; gear' and having a camming surface of increasing radius, said surface engaging a porj engaeingelement.

supporting framea twine arm rotatablymounted,

on said frame having a radially extending, portion and: an. axially extending; portion. for supporting twine at its end, a brakelever mounted on said? trams, braking means on said lever, said brake lever: and braking means. being mounted to be movable. from a'posi-tion outsidethe arc-of move.- ment. of said axial. portion of the twine: arm to a position. engaging said axial portion, operating means. for said twine arm, and a brake engaging 1-7:. A package: tying machine comprising'- in Combination with. a frame, afixed' package: support mounted on the: frame, a pivoted island table carriedby the frame, a rotatable; twine arm ,piv otally'mounted co-axially with the island table, anchor means. mountedto anchor the island table against pivotal movement, and cyclical operating means mounted to? move the parts through prodetermined cycle on anoperationthereof, a brake pivoted on the frameadja'cei-itv thepathof rotae 1 tion. of thetwine: arm during a'rotation. thereof, spring means mountedrnormal-ly to hold the-brake beyond the path or rotation of' thetw-ine arm, and a brake engaging element op,era-.tivelyeonnected' tothe cyclical operatin-gmeans to move the; brake into the path of" the twine arm at a predetermined point adjacent the end of its; cycle,

the; brake engaging; lement being positioned to release the brake: prior to the completion'ofv an operatin cycle; 1

18.. In a package tying machinecomprising a supporting frame, a twine arm: rotatablymounted on. said frame; having aradia-lly extending portion and an axially extending portion for supporting twinerat its end, a brake-lever mounted on said frame, flexible braking means carried'by said brake lever and: 'tensione'd thereby, said brake lever and flexible braking means beingmounted to be movable from a position outside the are of movementof said axial portion of the twine arm to. a position engaging said axial porti operating means for said twine, armincludin a gear, and a brake engaging element. carried by sa-id gear, saidbrake engaging element. engaging a, portion oi: said brake lever, whereby the brake lever is. moved intobra-king position by said. brake REFERENCES 7 CITED The following references are of record file of this patent: v V

UNITED STATES PATENTS. 7

Date

Number a Name Bunn. Nov. 9, 1926 BENJAMIN H..:BU-NNY.:-1

'KieWicz Nov; 19,1918 7 Bunn Sept.- 19, 1944' Bunn' Mar, 6,1}945 

